Improve Python code: address unused variables (#11049)

* Address F841 (unused variable).

* Reformat.

* Add changelog fragment.

* More cleanup.

* Remove trailing whitespace.

* Readd removed code as a comment with TODO.

plugins/modules/apt_rpm.py

@@ -155,7 +155,7 @@ def local_rpm_package_name(path):
     fd = os.open(path, os.O_RDONLY)
     try:
         header = ts.hdrFromFdno(fd)
-    except rpm.error as e:
+    except rpm.error:
         return None
     finally:
         os.close(fd)